diff options
| author | Vadim Dashevskiy <watcherhd@gmail.com> | 2012-05-15 10:38:20 +0000 |
|---|---|---|
| committer | Vadim Dashevskiy <watcherhd@gmail.com> | 2012-05-15 10:38:20 +0000 |
| commit | 48540940b6c28bb4378abfeb500ec45a625b37b6 (patch) | |
| tree | 2ef294c0763e802f91d868bdef4229b6868527de /plugins/CryptoPP/crypto/trunhash.h | |
| parent | 5c350913f011e119127baeb32a6aedeb4f0d33bc (diff) | |
initial commit
git-svn-id: http://svn.miranda-ng.org/main/trunk@2 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c
Diffstat (limited to 'plugins/CryptoPP/crypto/trunhash.h')
| -rw-r--r-- | plugins/CryptoPP/crypto/trunhash.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/plugins/CryptoPP/crypto/trunhash.h b/plugins/CryptoPP/crypto/trunhash.h new file mode 100644 index 0000000000..16fd8c09f8 --- /dev/null +++ b/plugins/CryptoPP/crypto/trunhash.h @@ -0,0 +1,48 @@ +#ifndef CRYPTOPP_TRUNHASH_H
+#define CRYPTOPP_TRUNHASH_H
+
+#include "cryptlib.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+class NullHash : public HashTransformation
+{
+public:
+ void Update(const byte *input, size_t length) {}
+ unsigned int DigestSize() const {return 0;}
+ void TruncatedFinal(byte *digest, size_t digestSize) {}
+ bool TruncatedVerify(const byte *digest, size_t digestLength) {return true;}
+};
+
+//! construct new HashModule with smaller DigestSize() from existing one
+template <class T>
+class TruncatedHashTemplate : public HashTransformation
+{
+public:
+ TruncatedHashTemplate(T hm, unsigned int digestSize)
+ : m_hm(hm), m_digestSize(digestSize) {}
+ TruncatedHashTemplate(const byte *key, size_t keyLength, unsigned int digestSize)
+ : m_hm(key, keyLength), m_digestSize(digestSize) {}
+ TruncatedHashTemplate(size_t digestSize)
+ : m_digestSize(digestSize) {}
+
+ void Restart()
+ {m_hm.Restart();}
+ void Update(const byte *input, size_t length)
+ {m_hm.Update(input, length);}
+ unsigned int DigestSize() const {return m_digestSize;}
+ void TruncatedFinal(byte *digest, size_t digestSize)
+ {m_hm.TruncatedFinal(digest, digestSize);}
+ bool TruncatedVerify(const byte *digest, size_t digestLength)
+ {return m_hm.TruncatedVerify(digest, digestLength);}
+
+private:
+ T m_hm;
+ unsigned int m_digestSize;
+};
+
+typedef TruncatedHashTemplate<HashTransformation &> TruncatedHashModule;
+
+NAMESPACE_END
+
+#endif
|